NO ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l4 0: l0 -> l1 : A^0'=A^post_1, R^0'=R^post_1, dobreak^0'=dobreak^post_1, n^0'=n^post_1, [ n^0<=0 && R^1_1==0 && R^post_1==0 && dobreak^post_1==dobreak^post_1 && A^0==A^post_1 && n^0==n^post_1 ], cost: 1 1: l0 -> l2 : A^0'=A^post_2, R^0'=R^post_2, dobreak^0'=dobreak^post_2, n^0'=n^post_2, [ 1<=n^0 && n^post_2==-1+n^0 && A^0==A^post_2 && R^0==R^post_2 && dobreak^0==dobreak^post_2 ], cost: 1 3: l1 -> l0 : A^0'=A^post_4, R^0'=R^post_4, dobreak^0'=dobreak^post_4, n^0'=n^post_4, [ dobreak^0<=0 && A^1_1==1 && A^post_4==0 && R^0==R^post_4 && dobreak^0==dobreak^post_4 && n^0==n^post_4 ], cost: 1 2: l2 -> l0 : A^0'=A^post_3, R^0'=R^post_3, dobreak^0'=dobreak^post_3, n^0'=n^post_3, [ A^0==A^post_3 && R^0==R^post_3 && dobreak^0==dobreak^post_3 && n^0==n^post_3 ], cost: 1 4: l3 -> l1 : A^0'=A^post_5, R^0'=R^post_5, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [ A^post_5==0 && R^post_5==0 && dobreak^post_5==dobreak^post_5 && n^post_5==n^post_5 ], cost: 1 5: l4 -> l3 : A^0'=A^post_6, R^0'=R^post_6, dobreak^0'=dobreak^post_6, n^0'=n^post_6, [ A^0==A^post_6 && R^0==R^post_6 && dobreak^0==dobreak^post_6 && n^0==n^post_6 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 5: l4 -> l3 : A^0'=A^post_6, R^0'=R^post_6, dobreak^0'=dobreak^post_6, n^0'=n^post_6, [ A^0==A^post_6 && R^0==R^post_6 && dobreak^0==dobreak^post_6 && n^0==n^post_6 ], cost: 1 Simplified all rules, resulting in: Start location: l4 0: l0 -> l1 : R^0'=0, dobreak^0'=dobreak^post_1, [ n^0<=0 ], cost: 1 1: l0 -> l2 : n^0'=-1+n^0, [ 1<=n^0 ], cost: 1 3: l1 -> l0 : A^0'=0, [ dobreak^0<=0 ], cost: 1 2: l2 -> l0 : [], cost: 1 4: l3 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 1 5: l4 -> l3 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l4 0: l0 -> l1 : R^0'=0, dobreak^0'=dobreak^post_1, [ n^0<=0 ], cost: 1 7: l0 -> l0 : n^0'=-1+n^0, [ 1<=n^0 ], cost: 2 3: l1 -> l0 : A^0'=0, [ dobreak^0<=0 ], cost: 1 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 Accelerating simple loops of location 0. Accelerating the following rules: 7: l0 -> l0 : n^0'=-1+n^0, [ 1<=n^0 ], cost: 2 Accelerated rule 7 with backward acceleration, yielding the new rule 8. [accelerate] Nesting with 1 inner and 1 outer candidates Removing the simple loops: 7. Accelerated all simple loops using metering functions (where possible): Start location: l4 0: l0 -> l1 : R^0'=0, dobreak^0'=dobreak^post_1, [ n^0<=0 ], cost: 1 8: l0 -> l0 : n^0'=0, [ n^0>=0 ], cost: 2*n^0 3: l1 -> l0 : A^0'=0, [ dobreak^0<=0 ], cost: 1 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l4 0: l0 -> l1 : R^0'=0, dobreak^0'=dobreak^post_1, [ n^0<=0 ], cost: 1 3: l1 -> l0 : A^0'=0, [ dobreak^0<=0 ], cost: 1 9: l1 -> l0 : A^0'=0, n^0'=0, [ dobreak^0<=0 && n^0>=0 ], cost: 1+2*n^0 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 Eliminated locations (on tree-shaped paths): Start location: l4 10: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, [ dobreak^0<=0 && n^0<=0 ], cost: 2 11: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ dobreak^0<=0 && n^0>=0 ], cost: 2+2*n^0 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 10: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, [ dobreak^0<=0 && n^0<=0 ], cost: 2 11: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ dobreak^0<=0 && n^0>=0 ], cost: 2+2*n^0 [test] deduced pseudo-invariant -dobreak^0+dobreak^post_1<=0, also trying dobreak^0-dobreak^post_1<=-1 Accelerated rule 10 with non-termination, yielding the new rule 12. Accelerated rule 10 with non-termination, yielding the new rule 13. Accelerated rule 10 with backward acceleration, yielding the new rule 14. [test] deduced pseudo-invariant -dobreak^0+dobreak^post_1<=0, also trying dobreak^0-dobreak^post_1<=-1 Accelerated rule 11 with non-termination, yielding the new rule 15. Accelerated rule 11 with non-termination, yielding the new rule 16. Accelerated rule 11 with backward acceleration, yielding the new rule 17. [accelerate] Nesting with 0 inner and 2 outer candidates Also removing duplicate rules: 13 16. Accelerated all simple loops using metering functions (where possible): Start location: l4 10: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, [ dobreak^0<=0 && n^0<=0 ], cost: 2 11: l1 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ dobreak^0<=0 && n^0>=0 ], cost: 2+2*n^0 12: l1 -> [6] : [ dobreak^0<=0 && n^0<=0 && dobreak^post_1<=0 ], cost: NONTERM 14: l1 -> [6] : [ dobreak^0<=0 && n^0<=0 && -dobreak^0+dobreak^post_1<=0 ], cost: NONTERM 15: l1 -> [6] : [ dobreak^0<=0 && n^0>=0 && dobreak^post_1<=0 ], cost: NONTERM 17: l1 -> [6] : [ dobreak^0<=0 && n^0>=0 && -dobreak^0+dobreak^post_1<=0 ], cost: NONTERM 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l4 6: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_5, n^0'=n^post_5, [], cost: 2 18: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=n^post_5, [ n^post_5<=0 ], cost: 4 19: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ n^post_5>=0 ], cost: 4+2*n^post_5 20: l4 -> [6] : [], cost: NONTERM 21: l4 -> [6] : [], cost: NONTERM 22: l4 -> [6] : [], cost: NONTERM 23: l4 -> [6] : [], cost: NONTERM Removed unreachable locations (and leaf rules with constant cost): Start location: l4 19: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ n^post_5>=0 ], cost: 4+2*n^post_5 20: l4 -> [6] : [], cost: NONTERM 21: l4 -> [6] : [], cost: NONTERM 22: l4 -> [6] : [], cost: NONTERM 23: l4 -> [6] : [], cost: NONTERM ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l4 19: l4 -> l1 : A^0'=0, R^0'=0, dobreak^0'=dobreak^post_1, n^0'=0, [ n^post_5>=0 ], cost: 4+2*n^post_5 23: l4 -> [6] : [], cost: NONTERM Computing asymptotic complexity for rule 23 Guard is satisfiable, yielding nontermination Resulting cost NONTERM has complexity: Nonterm Found new complexity Nonterm. Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Nonterm Cpx degree: Nonterm Solved cost: NONTERM Rule cost: NONTERM Rule guard: [] NO